311149 has 4 divisors (see below), whose sum is σ = 318780. Its totient is φ = 303520.

The previous prime is 311137. The next prime is 311153. The reversal of 311149 is 941113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 941113 = 503 ⋅1871.

It can be written as a sum of positive squares in 2 ways, for example, as 8649 + 302500 = 93^2 + 550^2 .

It is a cyclic number.

It is not a de Polignac number, because 311149 - 2⁷ = 311021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3754 + ... + 3835.

It is an arithmetic number, because the mean of its divisors is an integer number (79695).

2³¹¹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

311149 is a deficient number, since it is larger than the sum of its proper divisors (7631).

311149 is an equidigital number, since it uses as much as digits as its factorization.

311149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7630.

The product of its digits is 108, while the sum is 19.

The square root of 311149 is about 557.8073144017. The cubic root of 311149 is about 67.7625077328.

It can be divided in two parts, 3111 and 49, that added together give a triangular number (3160 = T₇₉).

The spelling of 311149 in words is "three hundred eleven thousand, one hundred forty-nine".